Line-space device for writing-machines.



E B. HESS.

LINE SPACE DEVICE FOR WRITING MACHINES.

APPLICATION FILED SEPT- 24, m4.

lPatente'd Dec. 12, .1916.

WITNESSES Ill/VE/VTOH @wmm EDWARD IE. HESS, OF BROOKLYN, NEW

YORK, ASSIGNOR TO ROYAL TYPEWRITER COMPANY, THU, 01? NEW YORK, N. Y., ACORPORATION OF NEW YORK.

nine-senor nnvrcn r on WRITING-MACHINES.

- Patented not... fa, tare.

Application filed September 24, 1914. Serial No. 863,264. 1

To alluikom it may concern Be it known that I, EDWARD B. Hess, a

' citizen of the United States of America, re-

siding in the borough of Brooklyn, in the city of NewYork, county ofKings, and State of New York, have invented a new and useful Line-SpaceDevice for VVriting-Maohines, of which the following is a specification.

This inventionrelates to the line spacing devices of type-writingmachines and consists particularly in certain improvements of the deviceshown in my U. S. Patent No. 856,869 of June 11, 1907.

Tn the accompanying drawings: Figure 1 is a plan view of the left handend of the carriage frame equipped with the line space devices of thisinvention; Fig. 2. an elevation of the same looking toward the left;

and the link 13, connected by its forwardend to the forward end of theshort arm of the lever S and by its rear end to the pawl carrying arm ofthe ratchet feed, acts under compression in causing the platen torotate. The arm 14, with which the link 13 conneots, has a rockingbearing coaxial with the platen shaft 12 on a sleeve 15 which extendsthrough the body of the frame 11 and through a downwardly bent extension16 of the bracket 10 of the frame. A nut 17 fitting enclwise between thebody of the frame and its part 16 screws on the sleeve 15 and holds itfirmly in position by a shoulder on the sleeve seating against theinside of the frame. This sleeve, as will be seen by Fig. 6, affords along bearing for the platen shaft 12.

l8 designates the ratchet wheel which connects with the platen by aclutch. l9 designates the pawl pivoted to the arm 14, 20 the pawlspring, and 21 the ratchet shield a. detached sectional View and linespace controller fitted to rock on the sleeve 15.

A spring 22 is provided for moving the lever 8 back into inactiveposition, being connected to a. short lug ascrew 24 on the frame. Thespring is located in a tubular shield 25, shown in section at Fig. 1andin perspective at Fig. 4. It is rigidly held by the screw 24 passingthrough a flattened portion at its end and by a pin 26. The'rearwardmovement of lever 8, under action of spring '22, is arrested by a stop27 against which its short arm strikes, said stop being a projectionfrom the stop plate 28 secured by screws to the extension 10 of theframe 11, as shown at Figs. 1 and 2. A forward stop is also provided forthe screw bolt having an eccentric head 29 located on the part 10 of.the frame and adapted to be set to stop the lever'coincidentally withthe contacing of the pawl 19 with the usual stop 30.. The eccentric 29also provides for the varying movement of the lever 8 due to the use ofr'athets of varying number of teeth.

The platen is set back for writing exponents or superior charactersthrough the medium of the ratchet wheel detent locking roller and itsspring 31, said spring being carried on a bracket 32 on the side of theoperating lever 33 mediate its pivotal end 34: and its operating knob orhandle The spring 31 is normally under tension with the side of thelever 33 resting against a pin 36, and the arrangement is such that thelever is, by its handle, moved rearwardly when an exponent is to bewritten. "This causes theratchet wheel and platen to 1'0: tatebackwardly, the extent of such movement to properly locate exponentsbeing determined by the stop pin 37. When the lever 33 is released thetension of the spring 31 will ordinarily set the platen back to originalline printing position'and bring the lever against the stop pin 36, butto insure that this return movement will always occur,

23 on the lever and a spring 38 is applied to the side of the lever oneend of a short shaft passing through the frame which has on its otherend a finger piece 41, the manipulation of which turns the cam againstthe tail piece 42 at the end of spring 31 and so, by bending the spring,moves and holds the detent roller away from the ratchet wheel.

1. In a typewriting machine, the combination of a carriage, itsfrontbearing, a platen mounted in the carriage, pawl and ratchet mechanismfor operating the platen for line spacing, a rocker arm carrying thepawl, a horizontally arranged pawl-operating lever pivoted to move abouta vertical axis 10 cated forwarp 1 of'the front bearing of the carriage,anda li nk connecting the rocker armwith the pawl-operating lever.

2. In a typewriting machine, the combination of a carriage, its frontbearing, a platen mounted in the carriage, pawl and ratchet mechanismfor operating the platen for line spacing, a rocker arm carrying thepawl, a horizontally arranged pawl-operating lever pivoted to move abouta vertical axis located forward of the front bearing of the carriage,and a link connected at its rear end to the rocker arm and at its frontend with the operating lever in a plane forward of the front of thecarriage.

3. In a typewriting machine, the combination of a carriage, its frontbearing, a platen mounted in the carriage, pawl and ratchet mechanismfor operating the platen for line spacing, a rocker arm carrying thepawl, a bracket extending forward from the carriage, a horizontallyarranged pawl-operating lever supported by the bracket and pivoted tomove about a vertical axis located forward of the front bearing of thecarriage, and a link connecting the rocker arm with the pawl operatinglever.

4. In a typewritin g machine, the combination with the carriage, theplaten and the pawl and ratchet for operating the platen for linespacing, of a bracket extending forward from the carriage frame, ahorizontally arranged line space operating lever pivoted to said bracketto move about a vertical axis located forward of the front bearing ofthe carriage, a stop plate attached to said bracket and engaging theoperating lever for limiting its return movement, a stop on the bracketfor limiting the forward movement of the lever, a horizontally arrangedincased spring connected with the lever and with the bracket for turningthe lever to normal position, a ratchet wheel connected with a'platen, apawl cooperating with the ratchet wheel, a rocking arm by which the pawlis carried and a link connected at one end with the arm extendingforward therefrom and connected at its front end with the operatinglever.

5. A line spacing device for a writing machine, comprising a platencontrolling ratchet wheel on a shaft having a bearing in the end frameof the carriage, a spring carried detent roller adapted to act on theratchet wheel, a vertical lever pivoted at its lower end to the carriageframe and to which the detent roller spring is secure between said pivotand the upper operating end of the lever and a forward and a backwardstop between which the lever is free to move.

6. A line spacing device for a writing machine, comprising a platencontrolling ratchet wheel on a shaft having a bearing in the end frameof the carriage, a spring carried detent roller adapted to act on theratchet wheel, a vertical lever pivoted at its lower end to the carriageframe and to which the detent roller spring is secured between saidpivot and the upper operating end of the lever, a forward and a backwardstop between which the lever is free to move and a spring for movingandholding the lever against its forward stop.

In testimony whereof, I have hereunto subscribed my name.

' EDWARD B. HESS. Witnesses:

L. C. MYER, GEORGE F. HANDLEY.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. 0."

